Articles
<![CDATA[Analisis uji tarik komposit serat bambu resin poliester dengan filler serabut kelapa menggunakan metode taguchi ]]>
<![CDATA[Robert Napitupulu]]>;
<![CDATA[Shanty Dwi Krisnaningsih]]>;
<![CDATA[Efata Anugrah Harita]]>
<![CDATA[ Jurnal Teknik Mesin Indonesia Vol. 17 No. 1 (2022): Jurnal Teknik Mesin Indonesia ]]>
Publisher : <![CDATA[Badan Kerja Sama Teknik Mesin Indonesia ]]>
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DOI: 10.36289/jtmi.v17i1.279
<![CDATA[Pengembangan komposit tidak hanya komposit sintetis yang diproduksi tetapi juga mendorong komposit serat alam karena sifatnya yang luar biasa yang dapat digunakan kembali. Dalam kajian ini serat alam yang digunakan untuk dikembangkan adalah serat dari bambu dengan filler serabut kelapa. Tujuan kajian ini untuk mengetahui komposisi campuran serat bambu resin polyester dengan filler serabut kelapa dalam analisis uji tarik untuk mencari kekuatan yang maksimal dan mengetahui besar persentase kontribusi dari variabel yang berpengaruh pada rasio volume matriks dan volume serabut kelapa, persentase alkali dan panjang serabut kelapa pada kekuatan tarik material serat komposit. Proses pembuatan komposit menggunakan metode hand lay-up yang dikombinasikan menggunakan Metode Taguchi dengan rancangan percobaan matriks orthogonal L4 (23), karena ada tiga parameter proses yang memiliki 2 level. Pengulangan dilakukan sebanyak 5 kali. Parameter proses rasio volume matriks dan volume serabut kelapa, konsentrasi alkali dan panjang serabut kelapa. Hasil kajian ini menunjukkan setting variabel parameter yang tepat untuk mendapatkan kekuatan tarik yang maksimal yaitu pada komposisi rasio volume matriks dan volume serabut kelapa 60%:20%, konsentrasi alkali 5% dan panjang serabut kelapa 30 mm dengan nilai uji tarik sebesar 54,34 MPa, persentase kontribusi parameter yang berpengaruh pada kekuatan tarik adalah panjang serabut kelapa sebesar 42,560 %.]]>
<![CDATA[PENERAPAN TEKNOLOGI TEPAT GUNA PENGOLAHAN LIMBAH KELAPA MUDA SEBAGAI MEDIA PUPUK ORGANIK KELAPA SAWIT DI KABUPATEN BANGKA ]]>
<![CDATA[Robert Napitupulu]]>;
<![CDATA[Yuli Dharta]]>;
<![CDATA[Subkhan Subkhan]]>;
<![CDATA[Diviya Arsieka Putri]]>;
<![CDATA[Devaned Parlindungan]]>;
<![CDATA[Aldi Pratama]]>;
<![CDATA[Hasdiansah Hasdiansah]]>;
<![CDATA[Clara Lavita Angelina]]>
<![CDATA[ Martabe : Jurnal Pengabdian Kepada Masyarakat Vol 6, No 2 (2023): martabe : jurnal pengabdian kepada masyarakat ]]>
Publisher : <![CDATA[Universitas Muhammadiyah Tapanuli Selatan ]]>
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DOI: 10.31604/jpm.v6i2.434-441
<![CDATA[Penerapan teknologi tepat guna pengolahan limbah kelapa muda sebagai media pupuk organik kelapa sawit di Kabupaten Bangka, merupakan kegiatan pengabdian dosen dan mahasiswa dengan melibatkan mitra, yaitu masyarakat yang peduli akan lingkungan dan aktif dalam pengembangan dan budidaya kelapa sawit di Kabupaten Bangka. Permasalahan yang dihadapi mitra adalah sulitnya mendapatkan pupuk yang disebabkan karena mahalnya harga pupuk anorganik dipasaran dan berdampak pada pengurangan hasil panen buah sawit. Selain itu, limbah kelapa muda jumlahnya sangat besar, apalagi dikala bulan puasa. Ini menjadi masalah tersendiri karena berpotensi menyebabkan terjadinya pencemaran lingkungan dan menjadi sarang penyakit. Limbah kelamud ternyata bisa digunakan menjadi bahan baku pembuatan pupuk organik bagi tanaman kelapa sawit. Saat ini proses pengolahan limbah kelamut masih dilakukan dengan cara manual menggunakan parang. Untuk dapat memecahkan masalah Mitra tersebut, maka kegiatan pengabdian kepada masyarakat ini dilaksanakan berupa pemberian bantuan penerapan TTG dalam pengolahan limbah kelamud serta pemberian pelatihan berupa cara pengoperasian dan perawatan mesin pengolah limbah kelamud dalam bentuk ceramah, diskusi, praktek dan introduksi mesin pencacah limbah kelamud untuk dijadikan bahan baku pupuk organik. Pelaksanaan kegiatan pengabdian kepada masyarakat ini nantinya diharapkan mitra mampu membuat pupuk organik dengan memanfaatkan limbah kelamud dan juga dapat mengurangi limbah kelamud yang tidak bermanfaat yang dapat menimbulkan berbagai penyakit. Hasil dari kegiatan ini mampu membantu IKM mengatasi persoalan pengolahan limbah kelamud menjadi lebih cepat dan efektif dengan kapasitasnya 201,04 Kg/jam sehingga mempercepat Proses pembuatan pupuk organik bagi tanaman kelapa sawit.]]>
<![CDATA[Perancangan Mesin Pencacah Limbah Kelapa Muda Secara Vertikal Menggunakan Metode Sintesis Pandangan ]]>
<![CDATA[Robert Napitupulu, S.ST., M.T.]]>;
<![CDATA[Yuli Dharta]]>;
<![CDATA[Diviya Arsieka Putri]]>;
<![CDATA[Devaned Parlindungan]]>;
<![CDATA[Aldi Pratama]]>;
<![CDATA[Clara Lavita Angelina]]>
<![CDATA[ Jurnal Teknologi Vol 23, No 1 (2023): April 2023 ]]>
Publisher : <![CDATA[Politeknik Negeri Lhokseumawe ]]>
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DOI: 10.30811/teknologi.v23i1.3781
<![CDATA[Increasing consumption of young coconuts (known as "Kelamud") is leading to a rise in the amount of waste generated by these coconuts. A group is using this waste as a raw material for the production of compost fertilizer for oil palm trees. However, the process is still performed manually by chopping waste with a machete of 15-20 mm thickness, which takes a considerable amount of time. This research aims to design and construct a machine for vertically chopping coconut waste. The proposed research method is a synthesis strategy that combines design concepts with the steps of clarifying and translating the client's desires. Then, these desires are incorporated into the machine design procedure by making selections, analyzing the interdependence and interrelationships between the selections, assessing trade-offs, and evaluating the outcomes of these selections. The final design of the Kelamud chopper machine consists of a motor with a 5.5 horsepower gasoline engine, a chopping system with a four-blade knife system, and a transmission system with pulleys and belts. Based on the results of the tests, the machine is capable of chopping waste from young coconuts with a capacity of 232.62 kg/hour in fibrous properties.]]>
<![CDATA[ANALISIS PENGARUH SUHU DAN WAKTU PROSES PENGEPRESAN CUP SAMBAL MENGGUNAKAN ALUMINIUM FOIL LID ]]>
<![CDATA[Kris Josua Pardede Kris]]>;
<![CDATA[Robert Napitupulu]]>;
<![CDATA[Shanty Dwi Krisnaningsih]]>
<![CDATA[ Prosiding Seminar Nasional Inovasi Teknologi Terapan Vol. 1 (2021): Prosiding Seminar Nasional Inovasi Teknologi Terapan ]]>
Publisher : <![CDATA[Politeknik Manufaktur Negeri Bangka Belitung ]]>
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<![CDATA[Pressing chili cups greatly affects the quality and has an impact on the kemplang produced. The process of pressing the chili paste is still done manually, which is wrapped in plastic, then put into a container of chili kemplang. As a result, the kemplang could not last long. This study aims to determine the setting of temperature and time variables, as well as the percentage of the contribution of temperature and time variables that affect the pressing of chili cups using aluminum foil lid. The research method used is referring to factorial Completely Randomized Design (CRD) with two variables. The first variable is temperature which consists of 3 levels, namely: 100 ° C, 150 ° C and 200 ° C. The second variable is the length of time holding which consists of 3 seconds, 4 seconds and 5 seconds. The treatment in this study was the result of a combination of variables from all levels of treatment, using the L9 Orthogonal Matrix (32). To avoid noise, each combination of variables was replicated 2 (two) times. The results showed that the best chili cup pressing variable setting was at a temperature of 150 ° C and a pressing time of 4 seconds, making the cups stick and close properly without any leakage. The largest percentage contribution from the influencing variable is temperature, amounting to 90.757%.]]>
<![CDATA[ANALISIS KEKASARAN PERMUKAAN PADA PROSES CNC TURNING MATERIAL BAJA ST 42 MENGGUNAKAN METODE TAGUCHI ]]>
<![CDATA[HERMANSYAH RHOMADAN]]>;
<![CDATA[Robert Napitupulu]]>;
<![CDATA[Husman Husman]]>
<![CDATA[ Prosiding Seminar Nasional Inovasi Teknologi Terapan Vol. 1 (2021): Prosiding Seminar Nasional Inovasi Teknologi Terapan ]]>
Publisher : <![CDATA[Politeknik Manufaktur Negeri Bangka Belitung ]]>
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<![CDATA[Minimum surface roughness is the target to be achieved in the workpiece machining process using CNC Turning. Where the smaller the surface roughness value will result in a better (smaller-is-better) surface roughness. This research aimsTo determine the variable combination settings (feeding motion, spindle rotation and infeed depth) to the minimum surface roughness, and to determine the percentage contribution of parameters that affect surface roughness in the CNC Turning process. The research method used the Taguchi method with L9 orthogonal matrix experimental design (33), because there are three process parameters that have three levels. Repetition is done twice. From the research results, the surface roughness value is obtained. In addition, the levels obtained from the spindle rotation process parameters (Rpm), feeding motion (feeding), and the depth of feeding that can minimize surface roughness. The results of this study indicate the right combination setting of parameter variables to produce the minimum surface roughness is a spindle rotation of 1250 put / min, infeed depth of 0.5 mm, feeding motion of 1.0 mm / rev. The percentage contribution of parameters that affects surface roughness is the infeed depth of 24.41%.]]>
<![CDATA[KEKUATAN TARIK DAN MODULUS ELASTISITAS BAHAN KOMPOSIT BERPENGUAT SERAT BAMBU DAN FILLER SERABUT KELAPA ]]>
<![CDATA[Efata Anugrah Harita]]>;
<![CDATA[Robert Napitupulu]]>;
<![CDATA[Shanty Dwi Krishnaningsih]]>
<![CDATA[ Prosiding Seminar Nasional Inovasi Teknologi Terapan Vol. 2 No. 01 (2022): Prosiding Seminar Nasional Inovasi Teknologi Terapan ]]>
Publisher : <![CDATA[Politeknik Manufaktur Negeri Bangka Belitung ]]>
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<![CDATA[ABSTRACT The reason for conducting this review is to determine the effect of alkalization on the tensile strength and elasticity of composites of bamboo fiber and coconut fiber with a polyester matrix by varying the NaOH with concentrations of 0%, 2%, and 5%. Alkalization is one of the modifications of natural fibers to develop a compatible fiber-matrix. This exploration strategy uses the hand lay-up technique. In the main cycle, bamboo fiber and coconut fiber were treated without alkalization or 0% alkalization and in the next interaction, bamboo and coconut fiber were soaked in water (2% and 5% NaOH) for 2 hours. Then, at that time, each treatment process was formed into a composite according to the standard tensile test of ASTM D638 – II. The volume portion of bamboo fiber is 15%, coconut fiber is 15% and polyester resin is 70%, and the arrangement of bamboo fibers and coconut fibers is arranged horizontally. The matrix used in this study is a polyester resin matrix of type 157 BTQN with 1% MEKPO hardener. The highest concentration from this review showed that bamboo fiber and coconut fiber composites with NaOH variations of 0%, 2% and 5% respectively had tensile strengths of 34.9 MPa, 34.9 MPa and 54.74 MPa. The highest concentration with 5% NaOH produced the highest tensile strength of 54.74 MPa, while the coconut fiber composite without alkalization had the lowest tensile strength of 34.9 MPa.]]>
<![CDATA[ANALISIS KEKASARAN PERMUKAAN BAJA SKD-11 PADA PROSES CNC TURNING MENGGUNAKAN METODE TAGUCHI ]]>
<![CDATA[Rabinaswil Samuel Napitupulu]]>;
<![CDATA[Robert Napitupulu]]>;
<![CDATA[Husman Husman]]>
<![CDATA[ Prosiding Seminar Nasional Inovasi Teknologi Terapan Vol. 2 No. 01 (2022): Prosiding Seminar Nasional Inovasi Teknologi Terapan ]]>
Publisher : <![CDATA[Politeknik Manufaktur Negeri Bangka Belitung ]]>
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<![CDATA[The machining process achieved with a CNC–Turning type SL25 B/500 based on the minimum surface roughness value, the reason for setting the variables smooth but contrary to the processing time because the longer the machining, the smoother the results. On the other hand, the longer the machining process, the more the costs involved. The research that has been conducted aims to determine the contribution of the CNC Turning process variables type SL-25 B/500 to reduce variations in the response of the workpiece surface roughness. This research also wants to achieve the suitable setting of the work variable of the SL-25 B/500 CNC turning machine to obtain the minimum (smaller is better) using a surfafe roughness test tool. The work variable that we want to work on are spindle rotation, feeding depth, and feeding motion. We determined the experiment design based on the Taguchi method and an orthogonal L18 matrix (21 x 37). Then to avoid interference, replication was carried out 2 times. This research proves the precise and accurate combination of work variable parameter settings to achieve the minimum surface roughness are spindle rotation of 640 put/min, feeding depth of 1 mm, and feeding motion of 0.05 mm/rev. The average of the surface roughness using the initial settings in the 16th combination experiment is 1,362 m.]]>
<![CDATA[ANALISIS MATERIAL REMOVAL RATE (MRR) BAJA SKD 11 PADA PROSES CNC TURNING DENGAN MENGGUNAKAN METODE TAGUCHI ]]>
<![CDATA[Jekki Dodi Parlindungan Sihombing]]>;
<![CDATA[Robert Napitupulu]]>;
<![CDATA[Angga Sateria]]>
<![CDATA[ Prosiding Seminar Nasional Inovasi Teknologi Terapan Vol. 2 No. 01 (2022): Prosiding Seminar Nasional Inovasi Teknologi Terapan ]]>
Publisher : <![CDATA[Politeknik Manufaktur Negeri Bangka Belitung ]]>
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<![CDATA[High MRR is a target to be achieved in the workpiece process using CNC turning. However, a slow process will affect the processing time of the product, and will increase production costs. To overcome this, it is necessary to set the right process parameters to produce the most influential contribution to the MRR and also to produce the maximum parameter value. The purpose of this research is to determine the effect of parameters (cutting speed, spindle speed and depth of cut) on the MRR and to determine the proper setting of process parameters in order to produce the maximum MRR for SKD-11 steel. The experimental design used is the L18 (21 x 37) orthogonal matrix. The repetition was done twice. From the results of the study, the MRR of the workpiece by using a combination variable setting that has the maximum value occurred in the 2nd combination experiment, with a value of 4.648 mm3/minute. With Spindle Rotation set at 210 put/min, feed depth set at 1.5 mm, feed motion set at 0.05 mm/rev.]]>
<![CDATA[RANCANG BANGUN MESIN PENEPUNG UMBI KELADI BENENG DENGAN SISTEM MONO DISK ]]>
<![CDATA[Aqila Zanjabila]]>;
<![CDATA[Doni]]>;
<![CDATA[Dyas Ryfkiansyah]]>;
<![CDATA[Robert Napitupulu]]>;
<![CDATA[Yang Fitri Arriyani]]>
<![CDATA[ Prosiding Seminar Nasional Inovasi Teknologi Terapan Vol. 2 No. 02 (2022): Prosiding Seminar Nasional Inovasi Teknologi Terapan ]]>
Publisher : <![CDATA[Politeknik Manufaktur Negeri Bangka Belitung ]]>
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<![CDATA[The process of flouring the tubers of taro beneng by Mr. Arizal is still done manually. The dried tubers are pounded using a pestle, then after the results are smooth, filtered using a special filter and if the results are still rough, the mashing process is carried out again. This flouring process takes time and is repeated for a relatively long time. This study aims to design and build a flour milling machine that can produce flour with a mesh fineness level of 0.5 mm and a machine capable of producing flour with a capacity of 10kg/hour. The research method used is the VDI 2222 method, starting with the stages of planning, conceptualizing, designing and completing. Furthermore, the process of making and assembling machines at the Polman Negeri Babel workshop was carried out. Then testing and analysis were carried out to determine the extent to which the results of the design and manufacture of the machine were carried out. Based on the design results, the driving motor uses an electric motor 1 HP 1400 RPM with a shaft diameter of 35mm. The transmission system uses a pulley and belt, the penepung system uses a mono disk system. Based on the test results, the average machine is able to flour beneng taro tubers with a capacity of 11.2 kg/hour with 0.5mm mesh fineness.]]>
<![CDATA[RANCANG BANGUN MESIN PENGIRIS DAUN TALAS BENENG ]]>
<![CDATA[Ridho Bagus Purwansyah]]>;
<![CDATA[Benny Nainggolan]]>;
<![CDATA[Febri Sulistiyo]]>;
<![CDATA[Robert Napitupulu]]>;
<![CDATA[Adhe Anggry]]>
<![CDATA[ Prosiding Seminar Nasional Inovasi Teknologi Terapan Vol. 2 No. 02 (2022): Prosiding Seminar Nasional Inovasi Teknologi Terapan ]]>
Publisher : <![CDATA[Politeknik Manufaktur Negeri Bangka Belitung ]]>
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<![CDATA[Taro Beneng (Xanthosoma undipes) is an abbreviation of large and koneng which means large and yellow which has prospects as an alternative food ingredient other than rice which is included in the type of tubers. This plant thrives in the Bangka Belitung area and has an economical selling value, one of which is taro leaves. Taro leaves can be used as raw material for making tobacco cigarettes. The processing of taro leaves by Mr. Arizal is done by chopping beneng taro leaves using a chopping machine with a thickness of 1.5-2 mm. This is still not in accordance with market demand that wants a thickness of 0.5–0.8mm. This study aims to design and build a taro leaf slicing machine with a thickness of 0.5-0.8 mm with a capacity of 5 Kg/hour. The research method used is using a synthesis system in view of combining design ideas with the stages of clarifying and translating the client's wishes. Then these desires are represented so that they can be brought into the process of designing machines, making choices, analyzing choices and the interrelationships between competing options, assessing the trade-offs in them and evaluating them. Based on the design of the taro beneng leaf slicing machine, the results obtained are the machine is capable of slicing leaves with a thickness of 0.5 - 0.8 millimeters with an average slicing result of 0.75mm. The cutting capacity of the taro leaf slicing machine is 4.8 kg/hour or only 53% which can be sliced from an average of 230 grams in an effective scale.]]>
